My birds will run with great delight for ANYTHING I throw. They don't disntinguish between scratch (which I basically don't use) and their commercial crumble feed. Both, once airborne, will trigger a veritable stampede.We will buy the higher protein feed and cut back on scratch (the girls are going to be so mad! Lol they run to us for it every day)
/edit sorry I can't offer more assistance. Feeding chickens is something I've been educating myself on. Poultry injury and illness is an area where I remain (mostly) ignorant.